Theres no way to put bb on AA you could have thought he thought u were stealing. Now if that had been me with AA you can bet the AK would have found a way to win LOL just my luck with online poker. but after he repops you, you have to think some. its definitely not a insta shove here preflop.. Flatting would be best so you can possibly get away from that hand cause even 22 has you beat. if you dont flop anything then its a easy fold. Low buyins i understand just shoving AK(well not really) like that but 20 buy in online is like a 100 buyin live play wise. your still going to have those who dont value money at all.